Hi Sorry if this is really simple and I am asking a question that makes people groan and roll their eyes

I have just bought a new computer, This computer is a 64 bit, with windows 8 the old one was 32bit vista.
Ive downloaded calibre 64bit on to the new one, do i just transfer my calibre library backup file or what is it i need to do to transfer my library from one to the other?
I appreciate any help on the matter as I am going grey trying to figure out how to move files from one computer to the other, anyone who knows how public files work and what name and password they are asking for, who can pass on this knowledge to me it would be greatly appreciated (I'm fairly certain my family would be thankful)
Amanda